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Barracuda Email Security Service IP Ranges

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See Active Directory Authentication for a list of IP addresses that must be allowed for uninterrupted access to LDAP from the Barracuda Cloud.

 

Barracuda Email Security Service IP address ranges based on the region you selected for your Barracuda Email Security Service:

Important – Note that the IP addresses below are in CIDR notation and express a range of IP addresses. Be sure to use the entire range in your configurations, including the first and last IPs in the range.

Customers Using the US Barracuda Email Security Service Instance

US: 64.235.144.0/20 and 209.222.80.0/21

Customers Using UK Barracuda Email Security Service Instance

UK: 35.176.92.96/27

Customers Using DE (Germany) Barracuda Email Security Service Instance

35.157.190.224/27

Ensure Connectivity and Redundancy

Follow these tips to ensure connectivity and redundancy:

  • Open your firewall ports to allow the IP address ranges, based on your Barracuda Email Security Service instance
  • (Optional) Configure your mail server or router to block inbound email not originating from your Barracuda Email Security Service IP address ranges.
  • If you have a Barracuda Web Security Gateway or Barracuda Web Application Firewall: You might need to exempt ess.barracudanetworks.com from filtering.
  • Exempt traffic coming from the Barracuda Email Security IP addresses from any kind of throttle or rate controls.

 

 

 

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